Massac County RainfallUnited StatesILMassac County90%Metropolis 90% Chance 90%Brookport 90% Chance 85%Mermet Lake 85% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville